Ruddy Duck Small 320×232 Medium 640×464 Large 1024×743 Download TIFF Original 2400×1741 | (1.5 MB) Description The Ruddy Duck (Oxyura jamaicensis) is a small stiff-tailed duck in the Anatidae family of ducks, geese, and swans. Keywords Anatidae, kduck, Oxyura jamaicensis, ruddy duck, stiff-tailed duck Galleries Birds: D-E Source: William Dwight Whitney The Century Dictionary: An Encyclopedic Lexicon of the English Language (New York, NY: The Century Co., 1911)